#ifndef _ASM_POWERPC_BOOK3S_64_TLBFLUSH_H
#define _ASM_POWERPC_BOOK3S_64_TLBFLUSH_H
+#define MMU_NO_CONTEXT ~0UL
+
+
#include <asm/book3s/64/tlbflush-hash.h>
+#include <asm/book3s/64/tlbflush-radix.h>
static inline void flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
+ if (radix_enabled())
+ return radix__flush_tlb_range(vma, start, end);
return hash__flush_tlb_range(vma, start, end);
}
static inline void flush_tlb_kernel_range(unsigned long start,
unsigned long end)
{
+ if (radix_enabled())
+ return radix__flush_tlb_kernel_range(start, end);
return hash__flush_tlb_kernel_range(start, end);
}
static inline void local_flush_tlb_mm(struct mm_struct *mm)
{
+ if (radix_enabled())
+ return radix__local_flush_tlb_mm(mm);
return hash__local_flush_tlb_mm(mm);
}
static inline void local_flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
+ if (radix_enabled())
+ return radix__local_flush_tlb_page(vma, vmaddr);
return hash__local_flush_tlb_page(vma, vmaddr);
}
static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
unsigned long vmaddr)
{
+ if (radix_enabled())
+ return radix__flush_tlb_page(vma, vmaddr);
return hash__flush_tlb_page_nohash(vma, vmaddr);
}
static inline void tlb_flush(struct mmu_gather *tlb)
{
+ if (radix_enabled())
+ return radix__tlb_flush(tlb);
return hash__tlb_flush(tlb);
}
#ifdef CONFIG_SMP
static inline void flush_tlb_mm(struct mm_struct *mm)
{
+ if (radix_enabled())
+ return radix__flush_tlb_mm(mm);
return hash__flush_tlb_mm(mm);
}
static inline void flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
+ if (radix_enabled())
+ return radix__flush_tlb_page(vma, vmaddr);
return hash__flush_tlb_page(vma, vmaddr);
}
#else
--- /dev/null
+/*
+ * TLB flush routines for radix kernels.
+ *
+ * Copyright 2015-2016, Aneesh Kumar K.V, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <linux/memblock.h>
+
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+
+static DEFINE_RAW_SPINLOCK(native_tlbie_lock);
+
+static inline void __tlbiel_pid(unsigned long pid, int set)
+{
+ unsigned long rb,rs,ric,prs,r;
+
+ rb = PPC_BIT(53); /* IS = 1 */
+ rb |= set << PPC_BITLSHIFT(51);
+ rs = ((unsigned long)pid) << PPC_BITLSHIFT(31);
+ prs = 1; /* process scoped */
+ r = 1; /* raidx format */
+ ric = 2; /* invalidate all the caches */
+
+ asm volatile("ptesync": : :"memory");
+ asm volatile(".long 0x7c000224 | (%0 << 11) | (%1 << 16) |"
+ "(%2 << 17) | (%3 << 18) | (%4 << 21)"
+ : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
+ asm volatile("ptesync": : :"memory");
+}
+
+/*
+ * We use 128 set in radix mode and 256 set in hpt mode.
+ */
+static inline void _tlbiel_pid(unsigned long pid)
+{
+ int set;
+
+ for (set = 0; set < POWER9_TLB_SETS_RADIX ; set++) {
+ __tlbiel_pid(pid, set);
+ }
+ return;
+}
+
+static inline void _tlbie_pid(unsigned long pid)
+{
+ unsigned long rb,rs,ric,prs,r;
+
+ rb = PPC_BIT(53); /* IS = 1 */
+ rs = pid << PPC_BITLSHIFT(31);
+ prs = 1; /* process scoped */
+ r = 1; /* raidx format */
+ ric = 2; /* invalidate all the caches */
+
+ asm volatile("ptesync": : :"memory");
+ asm volatile(".long 0x7c000264 | (%0 << 11) | (%1 << 16) |"
+ "(%2 << 17) | (%3 << 18) | (%4 << 21)"
+ : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
+ asm volatile("eieio; tlbsync; ptesync": : :"memory");
+}
+
+static inline void _tlbiel_va(unsigned long va, unsigned long pid,
+ unsigned long ap)
+{
+ unsigned long rb,rs,ric,prs,r;
+
+ rb = va & ~(PPC_BITMASK(52, 63));
+ rb |= ap << PPC_BITLSHIFT(58);
+ rs = pid << PPC_BITLSHIFT(31);
+ prs = 1; /* process scoped */
+ r = 1; /* raidx format */
+ ric = 0; /* no cluster flush yet */
+
+ asm volatile("ptesync": : :"memory");
+ asm volatile(".long 0x7c000224 | (%0 << 11) | (%1 << 16) |"
+ "(%2 << 17) | (%3 << 18) | (%4 << 21)"
+ : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
+ asm volatile("ptesync": : :"memory");
+}
+
+static inline void _tlbie_va(unsigned long va, unsigned long pid,
+ unsigned long ap)
+{
+ unsigned long rb,rs,ric,prs,r;
+
+ rb = va & ~(PPC_BITMASK(52, 63));
+ rb |= ap << PPC_BITLSHIFT(58);
+ rs = pid << PPC_BITLSHIFT(31);
+ prs = 1; /* process scoped */
+ r = 1; /* raidx format */
+ ric = 0; /* no cluster flush yet */
+
+ asm volatile("ptesync": : :"memory");
+ asm volatile(".long 0x7c000264 | (%0 << 11) | (%1 << 16) |"
+ "(%2 << 17) | (%3 << 18) | (%4 << 21)"
+ : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
+ asm volatile("eieio; tlbsync; ptesync": : :"memory");
+}
+
+/*
+ * Base TLB flushing operations:
+ *
+ * - flush_tlb_mm(mm) flushes the specified mm context TLB's
+ * - flush_tlb_page(vma, vmaddr) flushes one page
+ * - flush_tlb_range(vma, start, end) flushes a range of pages
+ * - flush_tlb_kernel_range(start, end) flushes kernel pages
+ *
+ * - local_* variants of page and mm only apply to the current
+ * processor
+ */
+void radix__local_flush_tlb_mm(struct mm_struct *mm)
+{
+ unsigned int pid;
+
+ preempt_disable();
+ pid = mm->context.id;
+ if (pid != MMU_NO_CONTEXT)
+ _tlbiel_pid(pid);
+ preempt_enable();
+}
+EXPORT_SYMBOL(radix__local_flush_tlb_mm);
+
+void radix___local_flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
+ unsigned long ap, int nid)
+{
+ unsigned int pid;
+
+ preempt_disable();
+ pid = mm ? mm->context.id : 0;
+ if (pid != MMU_NO_CONTEXT)
+ _tlbiel_va(vmaddr, pid, ap);
+ preempt_enable();
+}
+
+void radix__local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
+{
+ radix___local_flush_tlb_page(vma ? vma->vm_mm : NULL, vmaddr,
+ mmu_get_ap(mmu_virtual_psize), 0);
+}
+EXPORT_SYMBOL(radix__local_flush_tlb_page);
+
+#ifdef CONFIG_SMP
+static int mm_is_core_local(struct mm_struct *mm)
+{
+ return cpumask_subset(mm_cpumask(mm),
+ topology_sibling_cpumask(smp_processor_id()));
+}
+
+void radix__flush_tlb_mm(struct mm_struct *mm)
+{
+ unsigned int pid;
+
+ preempt_disable();
+ pid = mm->context.id;
+ if (unlikely(pid == MMU_NO_CONTEXT))
+ goto no_context;
+
+ if (!mm_is_core_local(mm)) {
+ int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
+
+ if (lock_tlbie)
+ raw_spin_lock(&native_tlbie_lock);
+ _tlbie_pid(pid);
+ if (lock_tlbie)
+ raw_spin_unlock(&native_tlbie_lock);
+ } else
+ _tlbiel_pid(pid);
+no_context:
+ preempt_enable();
+}
+EXPORT_SYMBOL(radix__flush_tlb_mm);
+
+void radix___flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
+ unsigned long ap, int nid)
+{
+ unsigned int pid;
+
+ preempt_disable();
+ pid = mm ? mm->context.id : 0;
+ if (unlikely(pid == MMU_NO_CONTEXT))
+ goto bail;
+ if (!mm_is_core_local(mm)) {
+ int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
+
+ if (lock_tlbie)
+ raw_spin_lock(&native_tlbie_lock);
+ _tlbie_va(vmaddr, pid, ap);
+ if (lock_tlbie)
+ raw_spin_unlock(&native_tlbie_lock);
+ } else
+ _tlbiel_va(vmaddr, pid, ap);
+bail:
+ preempt_enable();
+}
+
+void radix__flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
+{
+ radix___flush_tlb_page(vma ? vma->vm_mm : NULL, vmaddr,
+ mmu_get_ap(mmu_virtual_psize), 0);
+}
+EXPORT_SYMBOL(radix__flush_tlb_page);
+
+#endif /* CONFIG_SMP */
+
+void radix__flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+ int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
+
+ if (lock_tlbie)
+ raw_spin_lock(&native_tlbie_lock);
+ _tlbie_pid(0);
+ if (lock_tlbie)
+ raw_spin_unlock(&native_tlbie_lock);
+}
+EXPORT_SYMBOL(radix__flush_tlb_kernel_range);
+
+/*
+ * Currently, for range flushing, we just do a full mm flush. Because
+ * we use this in code path where we don' track the page size.
+ */
+void radix__flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end)
+
+{
+ struct mm_struct *mm = vma->vm_mm;
+ radix__flush_tlb_mm(mm);
+}
+EXPORT_SYMBOL(radix__flush_tlb_range);
+
+
+void radix__tlb_flush(struct mmu_gather *tlb)
+{
+ struct mm_struct *mm = tlb->mm;
+ radix__flush_tlb_mm(mm);
+}
projects / platform / kernel / linux-rpi.git / commitdiff